Safety attachment for hydraulic motors.



G. J. HENRY, JR. SAFETY ATTACHMENT TOR HYDRAULIC MOTORS.

APPLIOATION FILED MAR` 22, 1909.

Patented May 1'?, 1910.

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GEORGE J. HENRY, JR., OE SAN FRANCISCO, CALIFORNIA, ASSIGNOR 0F ONE-HALFTO THE PELTON WATER WHEEL COMPANY, A CORPORATION OF CALIFORNIA.

SAFETY ATTACHMENT FOR HYDRAULIC MOTORS.

Specification of Letters Patent.

Application filed March 22, 1909.

Patented May 17, 1910.

serial No. 434,992.

To all whom it may concern:

Be it known that I, GEORGE J. HENRY, Jr., a citizen of the UnitedStates, residing in the city and county of San Francisco and State ofCalifornia, have invented certain new and useful Improvements in SafetyAttachments for Hydraulic Motors, of which the following is aspecification.

The hereinafter described invention relates to that class of hydraulicmotors known as water wheels, which are driven from an impact streamdirected from a controlled nozzle onto the buckets of the water wheel;the object of the invention being to provide simple and eective meansfor automatically controlling the deflection of the impact stream toplace the same olf of the buckets of the water wheel on the destructionof the connection between the said wheel and the governing mechanism forvarying the quantity of the impact stream and the direction of the sameissuing from the nozzle, thereby preventing the wheel from running awayand rupturing the hydraulic plant.

To comprehend the invention, reference should be had to the accompanyingsheet of drawings, wherein- Figure 1 illustrates in side elevation awater wheel, a nozzle for directing a stream onto the buckets thereof,the governing mechanism for controlling the stream issuing from thenozzle in accordance with load changes on the wheel, and the means forautomatically controlling the deflection of the issuing stream on abreakage of the con nection between the Water wheel and the governingmechanism. Fig. 2 is a broken vertical sectional view of the fixedsleeve and the slide sleeve through which works the drive shaft orspindle for the governing means, disclosing the connection between thefulcrumed lever and the slidable sleeve. Fig. 3 is a cross section planview taken on line 3-3, Fig. 2 of the drawings.

In the drawings, the numeral 1 is used to indicate an ordinary waterwheel of the tangential type, 2 a controlled nozzle for directing animpact stream 2 onto the buckets 3 of the water wheel, and 5 adeliecting hood arranged in advance of the outlet orifice of the nozzlefor regulating the deflection of the issuing stream. The movement oftheswinging deflecting hood 4, which is mounted on the rock shaft 5 carriedat the outer end of the nozzle, is controlled by the fluid actuatedpiston 6, located within the cylinder 7, the piston stem 8 of said valvebeing connected to the crank arm 9 of the rock shaft 5, by means of thelink 10.

Fluid under pressure is admitted from the cylinder 11 into the cylinder7 by the pipe connections 13-13, fluid under pressure be ing deliveredinto the cylinder 11 by means of the supply pipe 14, leading from asuitable source of supply. The admission of fluid into the pipes 13-13respectively, is controlled by the usual pilot valve working within thecylinder 11, the stem 14 of which extends beyond the said cylinder andis raised and lowered during the working movement of the governing meansby the action of the fulcrumed lever 15. The inner end of this lever isconnected to a collar 16, slidable on the Xed sleeve 17 which collar inturn is connected, by means of a pin working within the slotted portion18 of the sleeve 17 to a vertically movable sleeve 19, the inner end ofthe pin connecting the lever 15 to the slide collar 16, and whichextends through the slotted portion 18 of the sleeve 17, rests within acircular groove cut in the face of the sleeve 19. The said sleeve 19 islocated and works within the sleeve 17 and over the rotatable drivespindle 20, which spindle is driven by the pinion 21 on the lower endthereof, meshing with a gear 22 of the shaft Rotation is imparted to theshaft 23 from the drive shaft 24 on which is mounted the water wheel 1,connection between the said shafts being made by the drive belt 25,working over the belt wheels 26-26 mounted respectively on the shafts23-24.

To the upper end of thedrive spindle 20, and within the governor casing27, is movably connected the upper arms 27 of the iy balls 28, the lowerarms 28 of which are connected to the vertically movable sleeve 19.

The outer end of the fulcrumed lever 15 is attached to a slide block15', loosely mounted on the valve stem 14, and which is held normally ina neutral position by the pressure of the springs 29-29, which bear ioorespectively against the slide block 15 and y The foregoing parts are ofwell known construction and the working thereof for regulating thestream issuing from a hydraulic nozzle understood by those skilled inthe art, which in brief is as follows: As the fly balls 28 of thegoverning means are thrown outwardly by the increased rotation of thespindle Q0, due to a reduction in the load placed onto the water wheel1, the sleeve 19 is raised, carrying therewith the collar 16 and liftingthe inner end of the fulcrumed lever 15, attached thereto. Such movementlowers the outer end of the said lever, causing the slide block 15',through the medium of the spring 9.9 to act against the collar 30 andforce downwardly the valve stem 14, to move the pilot valve within thecylinder 11 to uncover the lower port thereof, so as to allow of fluidunder pressure to pass from said cylinder through the connection 13 intothe cylinder 7, the pressure of which forces inwardly the piston 6, themovement of which is transmitted through the described, connection toraise the deflecting hood f1 and place the same into the impact stream2, to deliect a portion of the same from ott the buckets 3 of the waterwheel, and thereby secure water regulation in accordance with theworking load placed onto the water wheel. On an increase in the workingload placed onto the water wheel, the speed of the rotating spindle 9.0is decreased, which results in the fly balls 2S moving inwardly and adownward movement of the vertically movable sleeve 19, loweringtherewith the slide collar 1G and the inner end of the fulcrumed lever15. `With this movement of the said lever its outer end is raised,causing the slide block 15, acting against the collar 30 through themedium of the spring 29, to lift the valve stem 1li and shift the pilotvalve within thc cylinder 11 to open the upper port thereof and permitof fluid under pressure to pass from the cylinder 11 into the cylinder 7through the connection 13, back of the piston 6, which is forcedoutwardly within its cylinder so as to lower through its connections thedellecting hood 4, to move the same out of the stream and permit of agreater water quantity of the impact stream striking against the bucketsof the water wheel. 1n this manner, provision is made for regulating' bythe governing mechanism the water quantity of the impact stream onto thebucket of a water wheel, in accordance with variations in the workingloads placed thereon, and under normal conditions and within certainlimitations such working parts meet ordinary requirements, irrespectiveas to whether the deflection of the impact stream is accom plished inwhole or part by means of a deiiecting hood, or whether the nozzle bodyitself be deflected for such purpose. However, in case the drive beltconnection 25 for imparting motion of the shaft 24 to the shaft 23 foractuating the governing mechanism, or such other transmitting means asmay be employed for such purpose, becomes broken or destroyed, thegoverning mechanism is thrown out of commission, and the water wheelbeing uncontrolled runs wild or races, which results in heavy damage tothe hydraulic plant. It is to provide against such contingency and theresultant damage to the power plant, that has resulted in the presentinvention, which consists in means for automatically removing the impactstream from the buckets of the water wheel on the driving means for thegoverning mechanism being destroyed.

1n the present case, the automatic controlling means comprises a lever31, pivoted at its inner end to a fixed bracket 32. The upper edge ofthe said lever is situated within the path of the slide block 16, but ata point just beyond the limit of its downward movement under the normalworking condition of the governor mechanism. The outer end of the saidlever rests on an adjustable block 32, secured to the valve stem 14 ofthe pilot valve within the cylinder 11, a short distance below the block30. The manner of placing the outer end of the operating lever 31 intoengagement with the valve stem 14./ of the pilot valve is immaterial,likewise the construction of the said lever and the operation thereof bythe slide collar 16.

In use, presuming the connection between the drive shaft of the waterwheel and the shaft for the governing means to have broken, theoperation in the present case is as follows: Rotation of the spindle 20ceases, the fly balls 28 move inwardly and the sleeve 19 movesdownwardly below the limit of its normal stroke, causing the slidecollar 1G to engage with and throw the weight of the fly-balls and theslide sleeve connected therewith onto the pivoted lever 31, to forciblydepress the same and cause the outer end thereof resting on the collar32 secured on the valve stem 14 to exert a downward pressure thereon,sufficient to overcome the slight resistance offered by the light spring29 and the upward pressure of the lever 15 thereon. The pressure thusplaced by the lever 31 onto the fixed collar 32 forces inwardly thepilot valve within the cylinder 11, opening the lower port thereof, andpermitting fluid under pressure tolow from the said cylinder into thecylinder 12 through the connection 13, to force inwardly the piston 6,so as to raise through its connections therewith the deflecting hood et,and deflect the issuing impact stream from off the buckets of the waterwheel. The fluid actuated means of the governing mechanism is thusautomatically thrown into action for the placing of the water olf of thebuckets of the water wheel, on a rupture or breakage of the driveconnection between the water wheel and the governing means.

Having thus described the invention, what is claimed as new and desiredto be protected by Letters Patent is:

l. In a controlled hydraulic nozzle for regulating an impact streamrelative to a water wheel, the combination with the fluid actuated meansfor varying the impact stream, of governing mechanism for controllingthe luid actuated means, drive connection for operating the governingmechanism from the drive shaft of the water wheel, and means interposedbetween the governing mechanism. and the fluid actuated means forautomatically operating the same to place the impact stream Aott of thebuckets of the water wheel on a breakage in the drive connection for thegoverning mechanism.

2. In a controlled hydraulic nozzle for regulating an impact streamrelative to a water wheel, the combination with regulating devices forvarying the impact stream, governing mechanism, connection between saidmechanism and the regulating means, drive connection for impartingrotation of the water wheel to the governing mechanism, and meansinterposed between the said governing mechanism and the regulatingdevices for automatically operating the same on a breakage of the driveconnection for the governing mechanism.

3. In combination with a water wheel, of a nozzle for directing animpact stream onto the buckets of the water wheel, governing mechanism,drive connection for imparting rotation of the water wheel to thegoverning mechanism, regulating devices operated from said mechanism forcontrolling the impact stream in accordance with load changes, and meansinterposed between the governing mechanisms and the regulating devicesfor automatically operating the same to place the impact stream off ofthe water wheel on a breakage in the drive connection. 4f. In a waterwheel, the combination with the regulating mechanism for controlling animpact stream relatively to the water wheel, of governing mechanismdriven from the water wheel, and safety means interposed between thegoverning mechanism and the regulating mechanism, said meansautomatically placing into operation the regulating mechanism to placethe impact stream olf the water wheel on a breakage in the driveconnection for the governino` mechanism.

5. In an apparatus ot the described class, the combination with thegoverning mechanism, drive connection for actuating the same, a valvestem, a fulcrumed lever con` nection between said stem and the governingmechanism for operating the same under normal working conditions, and apivoted lever engaging the valve stem and operated by the governingmechanism to depress the said stem on a breakage in the drive connectionfor the said governing mechanism.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

GEORGE J. HENRY, Jn. Vitnesses:

N. A. AGKER, D. B. RICHARDS.

